Mycorrhizal association controls soil carbon-degrading enzyme activities and soil carbon dynamics under nitrogen addition: A systematic review

Yuanliu Hu; Ji Chen; Jørgen E. Olesen; Kees Jan van Groenigen; Dafeng Hui; Xinhua He; Guoyin Chen; Qi Deng

doi:10.1016/j.scitotenv.2024.175008

Mycorrhizal association controls soil carbon-degrading enzyme activities and soil carbon dynamics under nitrogen addition: A systematic review

Yuanliu Hu, Ji Chen^*, Jørgen E. Olesen, Kees Jan van Groenigen, Dafeng Hui, Xinhua He, Guoyin Chen, Qi Deng^*

^*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Review › Forskning › peer review

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Abstract

Recent evidence suggests that changes in carbon-degrading extracellular enzyme activities (C-EEAs) can help explain soil organic carbon (SOC) dynamics under nitrogen (N) addition. However, the factors controlling C-EEAs remain unclear, impeding the inclusion of microbial mechanisms in global C cycle models. Using meta-analysis, we show that the responses of C-EEAs to N addition were best explained by mycorrhizal association across a wide range of environmental and experimental factors. In ectomycorrhizal (ECM) dominated ecosystems, N addition suppressed C-EEAs targeting the decomposition of structurally complex macromolecules by 13.1 %, and increased SOC stocks by 5.2 %. In contrast, N addition did not affect C-EEAs and SOC stocks in arbuscular mycorrhizal (AM) dominated ecosystems. Our results indicate that earlier studies may have overestimated SOC changes under N addition in AM-dominated ecosystems and underestimated SOC changes in ECM-dominated ecosystems. Incorporating this mycorrhizal-dependent impact of EEAs on SOC dynamics into Earth system models could improve predictions of SOC dynamics under environmental changes.

Originalsprog	Engelsk
Artikelnummer	175008
Tidsskrift	Science of the Total Environment
Vol/bind	948
ISSN	0048-9697
DOI	https://doi.org/10.1016/j.scitotenv.2024.175008
Status	Udgivet - 20 okt. 2024

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10.1016/j.scitotenv.2024.175008Licens: CC BY

1-s2.0-S0048969724051581-mainForlagets udgivne version, 2,69 MBLicens: CC BY

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title = "Mycorrhizal association controls soil carbon-degrading enzyme activities and soil carbon dynamics under nitrogen addition: A systematic review",

abstract = "Recent evidence suggests that changes in carbon-degrading extracellular enzyme activities (C-EEAs) can help explain soil organic carbon (SOC) dynamics under nitrogen (N) addition. However, the factors controlling C-EEAs remain unclear, impeding the inclusion of microbial mechanisms in global C cycle models. Using meta-analysis, we show that the responses of C-EEAs to N addition were best explained by mycorrhizal association across a wide range of environmental and experimental factors. In ectomycorrhizal (ECM) dominated ecosystems, N addition suppressed C-EEAs targeting the decomposition of structurally complex macromolecules by 13.1 %, and increased SOC stocks by 5.2 %. In contrast, N addition did not affect C-EEAs and SOC stocks in arbuscular mycorrhizal (AM) dominated ecosystems. Our results indicate that earlier studies may have overestimated SOC changes under N addition in AM-dominated ecosystems and underestimated SOC changes in ECM-dominated ecosystems. Incorporating this mycorrhizal-dependent impact of EEAs on SOC dynamics into Earth system models could improve predictions of SOC dynamics under environmental changes.",

keywords = "Free-living decomposers, Mycorrhizal fungi, Nitrogen availability, Soil extracellular enzyme, Soil organic carbon",

author = "Yuanliu Hu and Ji Chen and Olesen, {J{\o}rgen E.} and {van Groenigen}, {Kees Jan} and Dafeng Hui and Xinhua He and Guoyin Chen and Qi Deng",

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Mycorrhizal association controls soil carbon-degrading enzyme activities and soil carbon dynamics under nitrogen addition: A systematic review. / Hu, Yuanliu; Chen, Ji; Olesen, Jørgen E. et al.
I: Science of the Total Environment, Bind 948, 175008, 20.10.2024.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Review › Forskning › peer review

TY - JOUR

T1 - Mycorrhizal association controls soil carbon-degrading enzyme activities and soil carbon dynamics under nitrogen addition

T2 - A systematic review

AU - Hu, Yuanliu

AU - Chen, Ji

AU - Olesen, Jørgen E.

AU - van Groenigen, Kees Jan

AU - Hui, Dafeng

AU - He, Xinhua

AU - Chen, Guoyin

AU - Deng, Qi

PY - 2024/10/20

Y1 - 2024/10/20

N2 - Recent evidence suggests that changes in carbon-degrading extracellular enzyme activities (C-EEAs) can help explain soil organic carbon (SOC) dynamics under nitrogen (N) addition. However, the factors controlling C-EEAs remain unclear, impeding the inclusion of microbial mechanisms in global C cycle models. Using meta-analysis, we show that the responses of C-EEAs to N addition were best explained by mycorrhizal association across a wide range of environmental and experimental factors. In ectomycorrhizal (ECM) dominated ecosystems, N addition suppressed C-EEAs targeting the decomposition of structurally complex macromolecules by 13.1 %, and increased SOC stocks by 5.2 %. In contrast, N addition did not affect C-EEAs and SOC stocks in arbuscular mycorrhizal (AM) dominated ecosystems. Our results indicate that earlier studies may have overestimated SOC changes under N addition in AM-dominated ecosystems and underestimated SOC changes in ECM-dominated ecosystems. Incorporating this mycorrhizal-dependent impact of EEAs on SOC dynamics into Earth system models could improve predictions of SOC dynamics under environmental changes.

AB - Recent evidence suggests that changes in carbon-degrading extracellular enzyme activities (C-EEAs) can help explain soil organic carbon (SOC) dynamics under nitrogen (N) addition. However, the factors controlling C-EEAs remain unclear, impeding the inclusion of microbial mechanisms in global C cycle models. Using meta-analysis, we show that the responses of C-EEAs to N addition were best explained by mycorrhizal association across a wide range of environmental and experimental factors. In ectomycorrhizal (ECM) dominated ecosystems, N addition suppressed C-EEAs targeting the decomposition of structurally complex macromolecules by 13.1 %, and increased SOC stocks by 5.2 %. In contrast, N addition did not affect C-EEAs and SOC stocks in arbuscular mycorrhizal (AM) dominated ecosystems. Our results indicate that earlier studies may have overestimated SOC changes under N addition in AM-dominated ecosystems and underestimated SOC changes in ECM-dominated ecosystems. Incorporating this mycorrhizal-dependent impact of EEAs on SOC dynamics into Earth system models could improve predictions of SOC dynamics under environmental changes.

KW - Free-living decomposers

KW - Mycorrhizal fungi

KW - Nitrogen availability

KW - Soil extracellular enzyme

KW - Soil organic carbon

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U2 - 10.1016/j.scitotenv.2024.175008

DO - 10.1016/j.scitotenv.2024.175008

M3 - Review

C2 - 39053526

AN - SCOPUS:85199351269

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JO - Science of the Total Environment

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Mycorrhizal association controls soil carbon-degrading enzyme activities and soil carbon dynamics under nitrogen addition: A systematic review

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